Environment-friendly coated paper

Abstract

The utility model relates to the technical field of environmental protection membrane-coated paper, disclose a kind of environmental protection membrane-coated paper, including food contact layer, heat insulation buffer layer, base layer, the heat insulation buffer layer is equipped in the lower portion of food contact layer, the EMAA functional layer with porous aerogel skeleton is equipped in the lower portion of heat insulation buffer layer, the base layer is equipped in the lower portion of EMAA functional layer;The utility model increases the shape as X type gel skeleton and transverse gel skeleton in EMAA functional layer inside, its X type gel skeleton and transverse gel skeleton are all three-dimensional composite EMAA material, improve its high-temperature strength, to avoid the problem that PLA layer fusion makes it soft due to temperature difference greatly.

Description

Technical Field

[0001] This utility model relates to the field of environmentally friendly coated paper technology, specifically to an environmentally friendly coated paper. Background Technology

[0002] Environmentally friendly coated paper is a paper-plastic composite material with environmental protection as its core characteristic. Through a casting process, plastic particles (such as PLA, which is derived from renewable plant resources such as corn and cassava and is a bio-based plastic, and PET) are uniformly coated on the paper surface to form a composite structure with functions such as oil resistance, water resistance, and heat sealing. It is mainly used in the food packaging field. In the packaging of fried foods, the existing environmentally friendly coated paper is used in the process of packaging fried foods. For freshly fried foods, the initial temperature is generally 160-180℃, while PLA bio-based plastics begin to soften at 55-60℃. In fact, the temperature difference is huge, which can easily cause the PLA layer to fuse and soften, thus affecting its use.

[0003] Therefore, we propose an environmentally friendly coated paper. Utility Model Content

[0004] The purpose of this invention is to provide an environmentally friendly coated paper to address the issue mentioned in the background art, where the initial temperature of food is generally 160-180℃, while PLA bio-based plastic begins to soften at 55-60℃. The temperature difference is so great that it can easily cause the PLA layer to fuse and soften, thus affecting its use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly coated paper, comprising a food contact layer, a heat insulation buffer layer, and a base layer, wherein a heat insulation buffer layer is provided below the food contact layer, an EMAA functional layer with a porous aerogel skeleton is provided below the heat insulation buffer layer, and a base layer is provided below the EMAA functional layer.

[0006] Preferably, the EMAA functional layer includes an X-shaped gel skeleton and a transverse gel skeleton, and the surfaces of the X-shaped gel skeleton and the transverse gel skeleton are filled with EMAA base resin as a filler material. The transverse gel skeleton is provided above the X-shaped gel skeleton, and the surface is filled with EMAA material as a filler material.

[0007] Preferably, the transverse gel skeleton is linearly distributed and is a three-dimensional composite EMAA material.

[0008] Preferably, the X-shaped gel skeleton is a three-dimensional composite EMAA material.

[0009] Preferably, the heat insulation buffer layer is a porous fiber layer.

[0010] Preferably, the porous fiber layer is a sugarcane pulp fiber layer.

[0011] Preferably, the food contact layer, base layer, heat insulation buffer layer, and EMAA functional layer are composited using an adhesive.

[0012] Preferably, the thickness of the EMAA functional layer is 10-20 μm.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention adds an X-shaped gel skeleton and a transverse gel skeleton inside the EMAA functional layer. Both the X-shaped gel skeleton and the transverse gel skeleton are made of three-dimensional composite EMAA material, which improves its high-temperature resistance and avoids the problem of PLA layer melting and softening due to extreme temperature difference. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the side cross-sectional structure of the EMAA functional layer of this utility model; Figure 2 This is a schematic diagram of the transverse gel skeleton structure of this utility model; Figure 3 This is a schematic diagram of the X-shaped gel skeleton structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the EMAA functional layer of this utility model; Figure 5 This is a schematic diagram of the overall front structure of this utility model; In the diagram: 1. Food contact layer; 2. Thermal insulation buffer layer; 3. Base layer; 4. EMAA functional layer; 401, X-shaped gel skeleton; 402, transverse gel skeleton. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example Please see Figures 1-5The illustration shows an environmentally friendly coated paper, comprising a food contact layer 1, a heat insulation buffer layer 2, and a base layer 3. The heat insulation buffer layer 2 is located below the food contact layer 1, and an EMAA functional layer 4 with a porous aerogel skeleton is located below the heat insulation buffer layer 2. The base layer 3 is located below the EMAA functional layer 4. This invention improves the high-temperature resistance of the EMAA functional layer by adding an X-shaped gel skeleton and a transverse gel skeleton inside the EMAA functional layer. Both the X-shaped gel skeleton and the transverse gel skeleton are made of three-dimensional composite EMAA material, thereby avoiding the problem of the EMAA layer melting and softening due to extreme temperature differences.

[0017] Furthermore, the EMAA functional layer 4 includes an X-shaped gel skeleton 401 and a transverse gel skeleton 402, and the surfaces of the X-shaped gel skeleton and the transverse gel skeleton are filled with EMAA filling material. The transverse gel skeleton 402 is provided above the X-shaped gel skeleton 401, and its surface is filled with EMAA filling material.

[0018] Furthermore, the transverse gel skeleton 402 is linearly distributed and is a three-dimensional composite EMAA material.

[0019] Furthermore, the X-shaped gel skeleton 401 is made of three-dimensional composite EMAA material.

[0020] Furthermore, the heat insulation buffer layer 2 is a porous fiber layer.

[0021] Furthermore, the porous fiber layer is a sugarcane pulp fiber layer.

[0022] Furthermore, the food contact layer 1, the base layer 3, the heat insulation buffer layer 2, and the EMAA functional layer 4 are bonded together with an adhesive.

[0023] Furthermore, the thickness of the EMAA functional layer 4 is 10-20 μm.

[0024] In this scheme, the EMAA functional layer production process involves feeding solid EMAA particles and ordinary EMAA particles into two co-extrusion main extruders. The EMAA melt is precisely extruded through a specially designed multi-channel spinning die to form the initial shapes of an X-shaped gel skeleton 401 and a transverse gel skeleton 402. The ordinary EMAA melt is uniformly wrapped and filled around the forming skeleton through another channel. After the molten composite is extruded from the die, it passes through a controllable stretching and cooling shaping zone. During this process, EMAA crystallizes and solidifies first, forming a robust "porous aerogel skeleton" structure, while the ordinary EMAA... EMAA is then filled in the space and cooled to set, ultimately forming a continuous, high-strength EMAA functional layer 4 film. An environmentally friendly adhesive is coated on the surface of the base layer 3. Then, the formed EMAA functional layer 4 with a microporous skeleton structure is hot-pressed onto the base layer 3 to firmly bond the two together. Next, an adhesive is coated on the surface of the EMAA functional layer 4, and then the pre-made heat-insulating buffer layer 2 sugarcane pulp fiber layer is laminated onto it. Finally, on the top heat-insulating buffer layer 2, food-grade EMAA resin is melt-coated using a conventional coating process to form a smooth and dense food contact layer 1.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly coated paper, comprising a food contact layer (1), a heat insulation buffer layer (2), and a base layer (3), characterized in that: Below the food contact layer (1) is a heat insulation buffer layer (2), below the heat insulation buffer layer (2) is an EMAA functional layer (4) with a porous aerogel skeleton, and below the EMAA functional layer (4) is a base layer (3). The EMAA functional layer (4) includes an X-shaped gel skeleton (401) and a transverse gel skeleton (402), and the surfaces of the X-shaped gel skeleton and the transverse gel skeleton are filled with EMAA base resin as a filler material. The transverse gel skeleton (402) is provided above the X-shaped gel skeleton (401), and the surface is filled with EMAA material as a filler material. The transverse gel skeleton (402) is linearly distributed and is a three-dimensional composite EMAA material; The X-shaped gel skeleton (401) is a three-dimensional composite EMAA material.

2. The environmentally friendly coated paper according to claim 1, characterized in that: The heat insulation buffer layer (2) is a porous fiber layer.

3. The environmentally friendly coated paper according to claim 2, characterized in that: The porous fiber layer is a sugarcane pulp fiber layer.

4. The environmentally friendly coated paper according to claim 1, characterized in that: The food contact layer (1), base layer (3), heat insulation buffer layer (2) and EMAA functional layer (4) are compounded by an adhesive.

5. The environmentally friendly coated paper according to claim 1, characterized in that: The thickness of the EMAA functional layer (4) is 10-20 μm.

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